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Custom Reports Using Data Collectors

Risk Assessment Checklist Report for

Product: Cluster Server

Platform: Solaris

Product version: 6.0.x

Product component: Global Cluster

Check category: All

Summary

Time synchronization

Check category: Availability


Check description: Checks whether the date and time are synchronized across the cluster.


Check procedure:

  • Determines the date and time set on each system in the SF Oracle RAC cluster.
  • Verifies whether the date and time are synchronized across all nodes in the cluster.


Check recommendation: It is recommended that the date and time settings are identical on all cluster nodes.



VCS application agent

Check category: Availability


Check description: Checks for the presence of VCS application agents in the system.


Check procedure:

  • Identifies the VCS application agents that are configured and installed.
  • Verifies whether the VCS application agents have correct versions.


Check recommendation: It is recommended that you install the missing VCS application agents listed in the output details.



VCS HAFD IP device

Check category: Availability


Check description: Checks whether the network interface that is specified in the cluster configuration exists on the system.


Check procedure:

  • Retrieves the information for the device on which the IP resources are configured.
  • Verifies that the network device that is specified exists on the target cluster systems.


Check recommendation: In the cluster configuration, make sure you specify the correct network device.


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Attributes required for configuring IP agent

VCS HAFD IP route

Check category: Availability


Check description: Checks whether the route to the IP address exists on the network interface specified in the cluster configuration.


Check procedure:

  • Fetches the route details from the configured IP resources.
  • Verifies that the route exits for the specified IP address on the associated network device.


Check recommendation: On the associated network device, add the route to the specified IP address.


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Attributes required for configuring IP agent

VCS HAFD NIC

Check category: Availability


Check description: Checks whether the UP flag is set for the network interface specified in the cluster configuration.


Check procedure:

  • Fetches the network interface details that are specified in the configuration of the target cluster.
  • Verifies that the device has been flagged as ONLINE.


Check recommendation: Make sure that you configure the Device attribute of the NIC resource type to a network interface that is configured on the system with the UP flag set. To set the UP flag on a configured device, use following command:!!Linux:!!# ip link set device_name up!!Solaris/AIX/HP:!!For IPv4:!!# ifconfig device_name inet up!!For IPv6:!!# ifconfig device_name inet6 up.


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Attributes required for configuring NIC agent

VCS ToleranceLimit

Check category: Availability


Check description: Checks whether the ToleranceLimit attribute has been set for the VCS NIC resource type.


Check procedure:

  • Retrieves the value of the ToleranceLimit attribute for the VCS NIC, MultiNICA, and MultiNICB resource types.
  • Verifies that the ToleranceLimit attribute is set to a non-zero number.


Check recommendation: Setting the ToleranceLimit to a non-zero value prevents false failover in the case of a spurious network outage. To set the ToleranceLimit for the NIC resource type, login as root and enter the following command:
# hatype -modify NIC ToleranceLimit n
where n > 0.
Because this command prevents an immediate failover and may compromise the high availability of the affected resource groups, only use this command on transient networks.


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About the ToleranceLimit attribute

VCS ClusterAddress

Check category: Availability


Check description: The ClusterAddress attribute is a prerequisite for GCO. This check verifies if the ClusterAddress Cluster attribute is set, and it is the same as the virtual IP address in the ClusterService service group.


Check procedure:

  • Executes the command haclus value ClusterAddress localclus on the target VCS node to get the virtual address assigned to the cluster.
  • Compares this value against the value of the Address attribute of the webip IP resource of the cluster.
  • Reports failure if they are not identical.


Check recommendation: Set the value of the Address attribute of the webip resource to that of the ClusterAddress Cluster atttribute.As root :
1. Get the value of the ClusterAddress Cluster attribute:
# haclus -value ClusterAddress -localclus
2. Modify the Address attribute of the webip resource:
# haconf -makerw
# hares -modify webip Address address
# hares -dump -makero, where address is the output of the first command.


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Cluster setup

VCS ClusterService OnlineRetryLimit

Check category: Availability


Check description: If the ClusterService service group is configured, it verifies that its OnlineRetryLimit is set.


Check procedure:

  • Retrieves the configuration details of the ClusterService service group.
  • Verifies that the OnlineRetryLimit is set for the ClusterService service group.


Check recommendation: Set the OnlineRetryLimit for the ClusterService service group.Enter:
hagrp -modify ClusterService OnlineRetryLimit N
where N >= 1


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About the OnlineRetryLimit attribute

VCS IfconfigTwice attribute

Check category: Best practices


Check description: Checks whether the IfconfigTwice attribute for the VCS IP resource type is set to 1. Setting the attribute to 1 ensures that when the IP address is brought online or failed over, the system sends multiple Address Resolution Protocol (ARP) packets to the network clients. Sending multiple packets reduces the risk of connection problems after a failover event.


Check procedure:

  • Make sure that you set IfconfigTwice to 1. To set the IfconfigTwice for the IP resource type, login as root and enter the following command:
  • #haconf -makerw
  • # hares -modify res_name IfconfigTwice 1
  • #haconf -dump -makero
  • Note: This attribute only applies to Solaris and HP-UX platforms.


Check recommendation: Make sure you set the IfconfigTwice attribute has been set to a value of 1 or larger.


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IPMultiNICA attributes

VCS NetworkHosts attribute

Check category: Best practices


Check description: Checks whether the NetworkHosts attribute for the VCS NIC resource type has been configured. This attribute specifies the list of hosts that are pinged to determine if the network is active. If you do not specify this attribute, the agent must rely on the NIC broadcast address. This causes a flood in network traffic.


Check procedure:

  • Retrieves the value of the NetworkHosts attribute for the VCS NIC, MultiNICA, and MultiNICB resource types.
  • Verifies that a list of IP addresses which can be pinged quickly is set for the NetworkHosts attributes.


Check recommendation: Make sure you configure the NetworkHosts attribute with a list of IP addresses that can be pinged to determine if the network connection is active. To set the NetworkHosts attribute for the NIC resource, login as root and enter the following command: # hares -modify res_name NetworkHosts ip_address where ip_address is a space separated list of IP addresses.


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NIC attributes

 
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